# Ultravox

Speech-native processing skips the STT-to-text bottleneck, preserving tone/cadence/pitch. Ultravox is freemium — a usable free tier with paid plans above it, at ultravox.ai.

## Facts

- **Pricing tier:** Free tier + paid
- **Free limit:** Only a one-time block of free call minutes, then pay per minute.
- **Works on:** Web, API
- **Works in browser:** Yes
- **Sign-up:** Google sign-in
- **Best free alternative:** [Bolna](https://aitools.flocci.in/tool/bolna)

## Capabilities

- Speech-native processing skips the STT-to-text bottleneck, preserving tone/cadence/pitch
- Free tier: 5¢/min including TTS for up to 5 concurrent calls
- Open-weight models (fixie-ai) published on Hugging Face for research use

## FAQ

### What is Ultravox?

Ultravox is listed under Real-Time Voice Agents, in the AI Agents & Automation category on Flocci AI Tools. Speech-native processing skips the STT-to-text bottleneck, preserving tone/cadence/pitch. It is freemium — a usable free tier with paid plans above it, and it lives at ultravox.ai.

### Is Ultravox free?

Partly. Only a one-time block of free call minutes, then pay per minute. If you need it free right now, Bolna does the same job for free.

### Can I use Ultravox in a browser, or is there an app?

Ultravox works in a normal browser tab with no install. It is available on the web and an API. You can sign in with a Google account.

### What can Ultravox do?

Ultravox does 3 things the catalog singles out: Speech-native processing skips the stt-to-text bottleneck, preserving tone/cadence/pitch; free tier: 5¢/min including tts for up to 5 concurrent calls; open-weight models (fixie-ai) published on hugging face for research use.

### What is the best free alternative to Ultravox?

Bolna is the best free alternative: it does the same job and you can start without paying. Kyutai Unmute, LiveKit Agents and Pipecat also start free. The full list is on the alternatives page.

## Related

- [Ultravox alternatives](https://aitools.flocci.in/alternatives/ultravox)
- [Real-Time Voice Agents](https://aitools.flocci.in/category/ai-agents-automation/real-time-voice-agents)
- [Best free real-time AI voice agent platforms](https://aitools.flocci.in/best/best-real-time-voice-agents)
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Source: Flocci AI Tools — https://aitools.flocci.in/tool/ultravox

Facts last verified: October 2026